Seriality Example

Toggle an LED with Radio Buttons

Wiring/Arduino Code

void setup()
{
  Serial.begin(9600);
  pinMode(13, OUTPUT);
}

void loop()
{
  char in;
  if (Serial.available()) {
    in = Serial.read();
    if (in == '!') {
      digitalWrite(13, HIGH);
    } else {
      digitalWrite(13, LOW);
    }
  }
}